Has she had any other prior surgeries bc it could be adhesions. I suffer from them & no test will show it. Is her pain all through her body? Maybe she has fibromyalgia bc that is hard to diagnose too.Have you tried a Neurologist bc it could be nerve pain too. I also have that & it can be diagnosed with tests. I'm just throwing things out there for you bc I feel bad for her. I am in constant pain & I know the feeling. Wishing & hoping you get a diagnosis. I truly understand bc I am trying to get a diagnosis with my pain & they are still trying to figure it out.